/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/OnlineBeacon.h
Notification of network error messages, allows a beacon to handle the failure
virtual void HandleNetworkFailure ( [UWorld](API\Runtime\Engine\Engine\UWorld) * World, [UNetDriver](API\Runtime\Engine\Engine\UNetDriver) * NetDriver, [ENetworkFailure::Type](API\Runtime\NetCore\Net\Core\Connection\ENetworkFailure__Type) FailureType, const [FString](API\Runtime\Core\Containers\FString) & ErrorString )